Intel Desktop Board DX48BT2 Technical Product Specification

Technical Reference

2.2.2.2 Add-in Card Connectors

The board has the following add-in card connectors:

• PCI Express 2.0 x16: two PCI Express 2.0 x16 connectors supporting

simultaneous transfer speeds up to 8 GB/sec of peak bandwidth per direction and

up to 16 GB/sec concurrent bandwidth.

• PCI Express 1.1 x4: one PCI Express 1.1 x4 connector (implemented using a x16

physical connector). The x4 interface supports simultaneous transfer speeds up to

250 MB/sec of peak bandwidth per direction and up to 2 GB/sec concurrent

bandwidth.

• PCI Conventional (rev 2.3 compliant) bus: two PCI Conventional bus add-in card

connectors. The SMBus is routed to all PCI Conventional bus connectors. PCI

Conventional bus add-in cards with SMBus support can access sensor data and

other information residing on the board.

Note the following considerations for the PCI Conventional bus connectors:

• All of the PCI Conventional bus connectors are bus master capable.

• SMBus signals are routed to all PCI Conventional bus connectors. This enables PCI

Conventional bus add-in boards with SMBus support to access sensor data on the

board. The specific SMBus signals are as follows:

⎯ The SMBus clock line is connected to pin A40.

⎯ The SMBus data line is connected to pin A41.

2.2.2.3 Auxiliary Front Panel Power/Sleep LED Header

Pins 1 and 3 of this header duplicate the signals on pins 2 and 4 of the front panel

header.

Table 16. Auxiliary Front Panel Power/Sleep LED Header

Pin Signal Name In/Out Description

1 HDR_BLNK_GRN Out Front panel green LED

2 Not connected

3 HDR_BLNK_YEL Out Front panel yellow LED